Although dairy products were once considered the most important sources of calcium, new research shows that consuming a diet high in fresh fruits and vegetables is your best defense against degenerative diseases like osteopenia and osteoporosis. Studies show the high acid content of traditional calcium sources like milk and cheese actually contribute to the degeneration of bone. Consuming lots of low-acid, calcium-rich fruits and vegetables builds strong bones and prevents bone diseases by maintaining the body's healthy acid-alkaline balance.